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-2.6-3.4a=0.12
We move all terms to the left:
-2.6-3.4a-(0.12)=0
We add all the numbers together, and all the variables
-3.4a-2.72=0
We move all terms containing a to the left, all other terms to the right
-3.4a=2.72
a=2.72/-3.4
a=-2.72/3.4
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